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A247530 Number of length n+3 0..5 arrays with some disjoint pairs in every consecutive four terms having the same sum 1
336, 600, 1124, 2164, 4228, 8440, 16932, 34068, 68688, 139040, 281646, 570720, 1157028, 2347720, 4764538, 9669762, 19627304, 39846710, 80899690, 164248362, 333480544, 677107822, 1374849942, 2791574878, 5668275372, 11509431434 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A247533

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 2*a(n-1) +8*a(n-2) -17*a(n-3) +a(n-4) +10*a(n-5) -157*a(n-6) +279*a(n-7) +287*a(n-8) -676*a(n-9) +1052*a(n-10) -1443*a(n-11) -3411*a(n-12) +6586*a(n-13) -1985*a(n-14) +16*a(n-15) +16530*a(n-16) -27897*a(n-17) -7486*a(n-18) +26143*a(n-19) -37856*a(n-20) +52993*a(n-21) +39856*a(n-22) -98023*a(n-23) +38862*a(n-24) -20108*a(n-25) -65879*a(n-26) +144966*a(n-27) -16963*a(n-28) -66316*a(n-29) +54163*a(n-30) -75893*a(n-31) +4252*a(n-32) +70664*a(n-33) -27769*a(n-34) +2220*a(n-35) -2909*a(n-36) -15058*a(n-37) +10538*a(n-38) -826*a(n-39) +1788*a(n-40) +1646*a(n-41) -2884*a(n-42) +1344*a(n-43) -572*a(n-44) -615*a(n-45) +437*a(n-46) +140*a(n-47) +112*a(n-48) -190*a(n-49) -20*a(n-50) +78*a(n-51) +a(n-52) -24*a(n-53) +8*a(n-55) -4*a(n-56)

EXAMPLE

Some solutions for n=6

..4....3....3....5....1....1....0....1....3....2....3....3....3....4....0....1

..2....2....2....4....4....4....4....3....2....2....4....4....2....3....2....0

..3....5....2....1....0....2....1....2....4....3....4....5....0....0....4....2

..3....4....1....2....5....3....5....0....3....1....5....4....5....1....2....1

..2....3....1....5....1....3....0....1....3....4....3....3....3....2....0....3

..4....2....0....4....4....2....4....1....4....2....2....2....2....1....2....4

..1....1....2....1....2....2....1....0....2....3....4....1....0....2....4....2

..3....4....3....0....5....3....3....2....5....5....1....4....1....1....2....1

..0....3....5....5....1....3....2....1....1....0....5....3....3....0....0....5

CROSSREFS

Sequence in context: A289220 A060664 A261551 * A064259 A181256 A006909

Adjacent sequences:  A247527 A247528 A247529 * A247531 A247532 A247533

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 18 2014

STATUS

approved

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Last modified November 15 08:37 EST 2019. Contains 329144 sequences. (Running on oeis4.)